Questions on reloading 45 ACP
Another thing to keep in mind is that if you size and deprive prior to cleaning, there is a small possibility (I've done it to myself) that tumbling media will become lodged in the flash hole in front of the primer, and if you don't watch out, you could load a round with that obstruction.
From experience, I can say that that happened to me often when I sized, deprimed, then cleaned. However, I was---and still am--anal retentive about my cases and noticed when that happened and had to clean the flash hole, so I can't say that I've ever fired a reload with an obstructed flash hole. It might not even do anything, but better to be safe, I thought.